high deflection mounts
TRANSCRIPT
8/9/2019 High Deflection Mounts
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ALL-ATTITUDE SHOCK PROTECTION COMBINED WITHSUPERIOR VIBRATION CONTROL
The HDM Mount and MHDM Mount are ideal for avariety of shock protection app lications. HDM Mountsare capable of deflec ting 0.75 inches in both theaxial and radial directions under a shock load. Bothdesigns also provide isolation when high amplitudevibration excitation is expected. While supportingthe rated load, the HDM Mount will attenuate a 15g,11ms, half-sine pulse to 10g and 30g, 11ms, half-sinepulse to 16g.
The HDM Mount is available in LORD BTR ® silicone and SPE ® I elastomers to suit a varietyof applications. The BTR silicone has excellentdamping characteristics as well as BroadTemperature Range performance characteristicsfrom -65°F to +300°F (-54°C to +149°C). LORDSPE I has good damping characteristics and issuitable for environments ranging from -65°F to+165°F (-54°C to +74°C).
HIGH DEFLECTION MOUNTSHDM SERIES, MHDM SERIES
8/9/2019 High Deflection Mounts
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FIGURE 1 – PART DIMENSIONS
FIGURE 3 – LOAD VS. DEFLECTION
FIGURE 2 – TRANSMISSIBILITY VS.FREQUENCY
Ø .210.195(5.33)(4.95)
.135
.115(3.43)(2.92)
.375-16UNC-2B THD. THRU
.381/.376 INSIDE DIA (FMP)X .06/.05 DEEP OPPOSITE END
Ø .48.46(12.2)(11.7)
.77
.76
1.7551.735(44.58)(44.07)
Ø 2.602.50(66.0)(63.5)
Ø 1.28(32.51)
Ø 3.353.32(85.1)(84.3)
3.415(86.74)
1.420(36.07)
2.840 (72.14)
1.420(36.07)
2.840(72.14)
MAXSQ
.524(13.31)
(19.6)(19.3)
0.01
0.1
1
10
1 10 100 1000
T r a n s m
i s s i b i l i t y ( T )
Frequency (Hz)
BTR SPE II
• Materials:
Metal parts and finish – aluminum alloy, chromatetreated per MIL-DTL-5541, Class 1A
Inner member – 6061-T651 alumin um
Outer member – 6061-T6 aluminum
Elastomer – LORD BTR ® Silicone or SPE ® I
Natural Rubber Blend
• Static load per mount: 12 to 50 lb (5.5 to 23 kg)
• Weight: 8.8 oz (250 g)
• Natural frequency: 20 to 25 Hz at 0.036 in (0.91 mm) D.A. and rated load
• Maximum dynamic input at resonance: 0.125 in D.A.
Metric values in parenthesis.
0.0 2.0 4.0 6.0 8.0 10.0
0
200
400
600
800
1000
1200
1400
0
50
100
150
200
250
300
350
0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4
Deflection (mm)
L o a d
( N )
L o a d
( l b s
)
Deflection (in)
HDM 100 50
HDM 100 40
HDM 100 30
HDM 200 30
HDM 101 20
HDM 201 20
HDM 101 12
HDM 201 12
1
2
34
5
6
7 8
1
2
3
4
5
6
7
8
TABLE 1 – PERFORMANCE CHARACTERISTICS
Part Number
Load Rating Dynamic AxialSpring Rate*
Dynamic RadialSpring Rate*
MaximumTransmissibility
lb kg lb/in N/mm lb/in N/mm
BTR
HDM 201 12 12 5.5 620 109 517 91 3.5
HDM 201 20 20 9.1 1033 181 861 151 3.5
HDM 200 30 30 14 1550 272 1107 194 3.5
SPE I
HDM 101 12 12 5.5 620 109 517 91 7
HDM 101 20 20 9.1 1033 181 861 151 6
HDM 100 30 30 14 1550 272 1107 194 5
HDM 100 40 40 18 2067 362 1292 226 5
HDM 100 50 50 23 2584 453 1615 283 5
* Dynamic input = 0.036 in (0.91 mm) D.A.
HIGH DEFLECTION MOUNTSHDM SERIES
8/9/2019 High Deflection Mounts
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FIGURE 1 – PART DIMENSIONS
FIGURE 2 – TRANSMISSIBILITYVS. FREQUENCY
• Materials:
Inner member – 2024-T351 aluminum alloy,chromate treated per MIL-DTL-5541, Class 1A
Outer member – 204-T3 or 2024-T351 aluminum,chromate treated per MIL-DTL-5541, Class 1A
Elastomer – LORD BTR ® Silicone
• Load capacity: 2 to 6 lb (0.91 to 2.7 kg)
• Weight:
2.05 oz (58g)
• Maximum dynamic input atresonance:
0.12 in D.A.
TABLE 1 – PERFORMANCE CHARACTERISTICS
HIGH DEFLECTION MOUNTSMHDM SERIES
Part NumberLoad Rating Dynamic Axial Spring Rate Natural
Frequency(Hz)
lb kg lb/in N/mm
MHDM-201-2 2 0.91 100 17.5 22
MHDM-201-4 4 1.8 200 35 22
MHDM-201-6 6 2.7 300 52.5 22
0.01
0.1
1
10
1 10 100 1000
T r a n s m
i s s i b
i l i t y ( T )
Frequency (Hz)
MEA
.970(24.64)
1.940(49.28)
.(60.7)
. . 24UNC-2BTHD THRU
1.051.01(26.7)(25.6)
Ø.161.151
(4.09)
(3.84)
Ø.811.809
(20.60)
(20.55)
Metric values in parenthesis.